SmartFlex Dual-Chamber Diesel Fuel Flow 
Meter
The SmartFlex™ dual-chamber flow meters 
are designed for fuel consumption measurement of diesel engine systems with flow 
rates up to 600 L/h. The flow meter measures fuel consumption in each line and 
computes the difference between supply and return. SmartFlex DFMs output 
NMEA2000® to a T1 or T2 SmartBoat® or 
SmartFlex Module*, for display on multi-function displays or Signal K 
interfaces.
Differential measurement of fuel 
consumption
SmartFlex dual-chamber DFMs have two measuring chambers for supply and return 
fuel lines. The flow meter measures fuel consumption in each line and computes 
the difference between supply and return.
Built-in battery
In case of the absence of an external power source, from the on-board network 
for example, the SmartFlex DFM keeps registering data to the internal memory. 
When external power is restored, all accumulated data will be transferred to the 
on-board monitoring terminal.
*SmartFlex DFM must be connected to a SmartBoat or SmartFlex T1 or T2 module.
DFM models provide data for fuel consumption including:
  - Instant 
  fuel consumption, L/H
- Hourly 
  fuel consumption in “Forward” line
- Hourly 
  fuel consumption in “Return” line
- Total 
  fuel consumption, L
- Total 
  fuel consumption in “Idling” mode of engine operation
- Total 
  fuel consumption in “Optimal” mode of engine operation
- Total 
  fuel consumption in “Overload” mode of engine operation
- Total 
  fuel consumption in “Negative” mode of flow meter operation (return exceeds 
  supply)
  - 
  Lower overall cost due to differential sensor capabilities
- 
  Ease of installation with optional accessory kit
- 
  Automatic Temperature compensation
- 
  Simple set up using the SmartFlex View software embedded in the Airmar 
  SmartFlex or SmartBoat module
- 
  Fuel never comes in contact with gears or other parts that might clog or 
  corrode
- 
  The sensor is digital – specialized wiring isn’t required – plug and play to 
  the SmartFlex or SmartBoat Module for data delivery to the display.
 
  
  Brand: Airmar 
  Technology
  
  Connecting Thread: M16 
  x 1.5
  
  Connection Type: Threaded
  
  Flow Capacity: 100 
  – 600 LPH ±1% (26 – 158 GPH ±1%)
  
  Fuel Type: Diesel
  
  LCD Display: No
  
  Material: Alloy
  
  Number of Chambers: Dual
  
  Number of Engines: Multiple